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