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