One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,9)(5,10)(6,7)(11,15)(12,13)(14,16)(17,18,22,26)(19,20,24,23)(21,25,29,32)(27,28,31,30)(33,34,38,40)(35,43,44,39)(36,45,46,41)(37,42,47,48)(1,3)(2,8)(4,11)(5,7)(6,10)(9,15)(12,14)(13,16)(17,18)(19,23)(20,24)(21,25)(22,26)(27,30)(28,31)(29,32)(33,35,38,44)(34,39,40,43)(36,37,46,47)(41,42,45,48)(2,6)(3,5)(4,12)(15,16)(19,24)(20,23)(21,29)(25,32)(34,40)(36,46)(37,47)(39,43) involution — undirected(1,4,7,12)(2,9,6,13)(3,11,5,14)(8,15,10,16)(17,19)(18,23)(20,26)(21,27)(22,24)(25,30)(28,32)(29,31)(33,36,38,46)(34,41,40,45)(35,37,44,47)(39,42,43,48)(1,5,7,3)(2,10,6,8)(4,11,12,14)(9,15,13,16)(17,20,22,23)(18,24,26,19)(21,28,29,30)(25,31,32,27)(33,37)(34,42)(35,36)(38,47)(39,41)(40,48)(43,45)(44,46)(1,6,7,2)(3,10,5,8)(4,13,12,9)(11,16,14,15)(17,21,22,29)(18,25,26,32)(19,27,24,31)(20,28,23,30)(33,34)(35,39)(36,41)(37,42)(38,40)(43,44)(45,46)(47,48)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.