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