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