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