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