One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,9)(3,10,12,15)(4,8,5,14)(7,13,16,11)(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)(1,3,4,13,6,12,5,11)(2,7,14,15,9,16,8,10)(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)(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(19,31)(24,39)(29,40)(30,45)(32,33)(38,44)(43,48)(46,47) involution — undirected(1,4,6,5)(2,8,9,14)(3,11,12,13)(7,15,16,10)(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.