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