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