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