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