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