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