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