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