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