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