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