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