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