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