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)(19,23)(20,25)(21,31)(22,27)(24,29)(26,28)(30,32)(1,3,5,8)(2,6,4,7)(9,10,12,13)(11,16,15,14)(17,19,22,29)(18,23,27,24)(20,28,30,21)(25,26,32,31)(9,10)(11,14)(12,13)(15,16)(17,20,22,30)(18,24,27,23)(19,28,29,21)(25,26,32,31)(3,8)(6,7)(10,13)(14,16)(17,20)(18,25)(19,28)(21,29)(22,30)(23,26)(24,31)(27,32) involution — undirected(1,4,5,2)(3,7,8,6)(9,11,12,15)(10,14,13,16)(19,29)(20,30)(23,24)(25,32)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.