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