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