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