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