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