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