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