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