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