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