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