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