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