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