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