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