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