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