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