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)(23,28)(24,31)(27,39)(30,43)(32,42)(33,41)(34,40)(35,46)(36,45)(38,44)(47,48) involution — undirected(9,10)(11,15)(12,14)(13,16)(17,19,23,20)(18,24,28,41)(21,34,36,47)(22,33,39,31)(25,37,29,27)(26,43,45,42)(30,35,32,38)(40,44,48,46)(1,3,5,4)(2,6,7,8)(9,11,12,16)(10,13,14,15)(17,20,23,19)(18,25,28,29)(21,32,36,30)(22,33,39,31)(24,37,41,27)(26,42,45,43)(34,38,47,35)(40,44,48,46)(11,16)(13,15)(17,21,23,36)(18,26,28,45)(19,30,20,32)(22,38,39,35)(24,40,41,48)(25,42,29,43)(27,46,37,44)(31,34,33,47)(1,4,5,3)(2,6,7,8)(10,14)(13,15)(19,20)(24,41)(25,29)(30,32)(31,33)(34,47)(40,48)(42,43)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.