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