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