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