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