One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6)(7,12)(8,16)(9,14)(10,11)(13,18)(15,17)(19,20)(21,22,27,31)(23,32,24,28)(25,29,35,34)(26,30,36,33)(1,2,3,4)(21,23,27,24)(22,28,31,32)(25,30,35,33)(26,34,36,29)(6,11)(7,14)(13,16)(15,20)(23,24)(25,35)(28,32)(29,34) involution — undirected(5,7,10,14)(6,12,11,9)(8,15,18,20)(13,19,16,17)(21,24,27,23)(22,28,31,32)(25,33,35,30)(26,34,36,29)(5,8,10,18)(6,13,11,16)(7,15,14,20)(9,17,12,19)(21,25)(22,29)(23,30)(24,33)(26,28)(27,35)(31,34)(32,36)(5,9,10,12)(6,14,11,7)(8,17,18,19)(13,20,16,15)(21,26)(22,30)(23,29)(24,34)(25,28)(27,36)(31,33)(32,35)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.