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