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