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