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