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