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