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