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