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