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