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)(17,18,23,35,22,26,21,27)(19,24,36,46,29,38,30,39)(20,31,34,25,33,41,32,40)(28,42,45,37,43,48,44,47)(1,2)(3,6)(4,8)(5,7)(9,11)(10,13)(12,16)(14,15)(17,19)(18,24)(20,28)(21,30)(22,29)(23,36)(25,37)(26,38)(27,39)(31,42)(32,44)(33,43)(34,45)(35,46)(40,47)(41,48) involution — undirected(1,2)(3,8)(4,6)(5,7)(11,16)(13,15)(17,20,22,33)(18,25,26,40)(19,28,29,43)(21,34,23,32)(24,37,38,47)(27,41,35,31)(30,45,36,44)(39,48,46,42)(1,3,5,4)(2,6,7,8)(10,14)(13,15)(19,29)(24,38)(28,43)(30,36)(37,47)(39,46)(42,48)(44,45)(1,4,5,3)(2,6,7,8)(18,26)(24,38)(25,40)(27,35)(31,41)(37,47)(39,46)(42,48)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.