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