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