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