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