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