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