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