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