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