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