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