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