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