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