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