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