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)(13,14,17,18)(15,16,19,20)(21,22)(23,31)(24,34)(25,33)(26,27)(28,32)(29,35)(30,36)(5,6,9,12)(7,10,8,11)(13,15,17,19)(14,16,18,20)(22,27)(23,32)(29,34)(30,33)(5,7,9,8)(6,10,12,11)(13,16)(14,15)(17,20)(18,19)(21,23)(22,28)(24,33)(25,29)(26,32)(27,31)(30,35)(34,36)(1,2,3,4)(5,6)(7,10)(8,11)(9,12)(13,15)(14,16)(17,19)(18,20)(21,24,26,35)(22,29,27,34)(23,33,32,30)(25,31,36,28)(5,8,9,7)(6,11,12,10)(13,14)(15,16)(17,18)(19,20)(21,25)(22,30)(23,34)(24,28)(26,36)(27,33)(29,32)(31,35)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.