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