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