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