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