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