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