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