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