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