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