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