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