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