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