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