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