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