One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,8)(3,10,12,7)(4,13,14,9)(5,15,16,11)(17,18,22,27)(19,23,30,24)(20,25,31,29)(21,28,32,26)(33,34,39,42)(35,43,45,38)(36,40,37,41)(44,48,47,46)(1,3)(2,7)(4,11)(5,9)(6,12)(8,10)(13,16)(14,15)(17,19)(18,23)(20,28)(21,29)(22,30)(24,27)(25,32)(26,31)(33,35)(34,38)(36,44)(37,47)(39,45)(40,46)(41,48)(42,43) involution — undirected(2,8)(4,14)(7,10)(11,15)(17,19,22,30)(18,24,27,23)(20,28,31,26)(21,29,32,25)(33,36,39,37)(34,40,42,41)(35,44,45,47)(38,46,43,48)(1,4,6,14)(2,9,8,13)(3,11,12,15)(5,10,16,7)(17,19)(18,23)(20,28)(21,29)(22,30)(24,27)(25,32)(26,31)(33,34)(35,38)(36,40)(37,41)(39,42)(43,45)(44,46)(47,48)(1,3)(2,10)(4,11)(5,13)(6,12)(7,8)(9,16)(14,15)(17,20)(18,25)(19,28)(21,24)(22,31)(23,32)(26,30)(27,29)(33,37,39,36)(34,41,42,40)(35,44,45,47)(38,46,43,48)(1,5,6,16)(2,11,8,15)(3,9,12,13)(4,10,14,7)(17,21,22,32)(18,26,27,28)(19,29,30,25)(20,23,31,24)(33,38)(34,35)(36,46)(37,48)(39,43)(40,44)(41,47)(42,45)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.