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