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