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