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