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