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