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