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