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