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