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