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