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