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