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