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