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