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