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