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