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