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