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