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