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