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