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