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