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