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