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