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)(17,18)(19,26)(20,23)(21,24)(22,25)(27,32)(28,30)(29,31)(1,3)(2,6)(4,7)(5,8)(9,11,13,16)(10,14,12,15)(17,19,22,20)(18,23,25,26)(21,27,29,28)(24,30,31,32)(2,7)(4,6)(19,20)(21,29)(23,26)(24,31) involution — undirected(1,4,5,6)(2,3,7,8)(9,12,13,10)(11,15,16,14)(17,20,22,19)(18,23,25,26)(21,28,29,27)(24,30,31,32)(1,3)(2,6)(4,7)(5,8)(17,21)(18,24)(19,27)(20,28)(22,29)(23,30)(25,31)(26,32) involution — undirected(17,18)(19,26)(20,23)(21,24)(22,25)(27,32)(28,30)(29,31) 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.