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