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