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