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