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