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