One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,10)(6,11)(7,12)(8,13)(9,15)(14,16)(17,18)(19,29)(20,34)(21,26)(22,27)(23,28)(24,32)(25,38)(30,45)(31,40)(33,44)(35,39)(36,43)(37,42)(41,47)(46,48) involution — undirected(1,3,7,14)(2,8,12,15)(4,11,16,10)(5,9,6,13)(17,19)(18,24)(20,35)(21,31)(22,32)(23,33)(25,41)(26,29)(27,44)(28,40)(30,36)(34,45)(37,47)(38,46)(39,42)(43,48)(1,4,5,15,7,16,6,8)(2,9,11,3,12,13,10,14)(17,20,21,37,23,38,22,36)(18,25,27,42,28,34,26,43)(19,30,32,46,33,47,31,35)(24,39,29,41,40,48,44,45)(1,5,7,6)(2,10,12,11)(3,9,14,13)(4,15,16,8)(17,21,23,22)(18,26,28,27)(19,31,33,32)(20,36,38,37)(24,29,40,44)(25,42,34,43)(30,46,47,35)(39,45,48,41)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.