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