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