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