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