One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,4)(3,7,8,6)(10,13)(11,15)(17,18,24,31,22,20,23,27)(19,28,32,30,29,25,21,26)(1,3,5,8)(2,6,4,7)(10,13)(11,15)(17,19)(18,25)(20,28)(21,23)(22,29)(24,32)(26,31)(27,30)(1,4,5,2)(3,7,8,6)(9,10)(11,14)(12,13)(15,16)(17,20,22,18)(19,25,29,28)(21,26,32,30)(23,27,24,31)(3,8)(6,7)(10,13)(14,16)(17,21)(18,26)(19,24)(20,30)(22,32)(23,29)(25,27)(28,31) involution — undirected(9,11,12,15)(10,14,13,16)(19,29)(21,32)(25,28)(26,30)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.