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