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