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