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)(11,14)(12,13)(15,16)(17,18)(19,28)(20,24)(21,26)(22,25)(23,27)(29,32)(30,31)(1,3)(2,5)(4,8)(6,7)(17,19)(18,21)(20,29)(22,26)(23,30)(24,27)(25,28)(31,32) involution — undirected(10,13)(14,16)(17,20,29,19,22,30,23,26)(18,24,32,28,25,31,27,21)(2,6)(5,7)(9,11,12,15)(10,14,13,16)(18,25)(21,28)(24,31)(27,32)(3,8)(5,7)(17,21,29,24,22,28,23,31)(18,26,32,20,25,19,27,30)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.