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