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