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