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