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