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