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