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