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