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