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