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