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